G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/10 (2006.01) G01N 21/31 (2006.01) G01N 21/78 (2006.01) G01N 27/00 (2006.01) H01J 49/26 (2006.01)
Patent
CA 2594957
A method is described for the total phosphine detection in cereal caryopses, comprising the steps of inserting a sample of cereal caryopses inside a container (1) equipped with hermetic closure (2); adding to the sample an aqueous solution of H2SO4 with a v/v concentration in the range of 5-20%, with obtainment of an aqueous dispersion, and hermetically closing the first container (1); subjecting the aqueous dispersion contained in the first container (1) to the action of microwaves for a time not greater than 3 minutes; drawing a predetermined volume of gas overlying the aqueous dispersion and detecting any phosphine that may be present by means of colorimetric and/or spectrophotometric methods, preferably by bringing it into contact with a predetermined volume of an aqueous solution of AgNO3 of known molarity, inside a second container (3) with hermetic closure and visually analysing the obtained colour and/or spectrophotometrically measuring the absorbance at 400 nm of the aqueous solution. Equipment for the execution of the aforesaid method is described.
Longobardi Francesco
Pascale Michelangelo
Ranieri Roberto
Silvestri Marco
Visconti Angelo
Barilla G. E. R. Fratelli S.p.a.
Consiglio Nazionale Delle Richerche
Norton Rose Or S.e.n.c.r.l.,s.r.l./llp
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